Radio Broadcast Beam Coverage Enhancement Method and Apparatus

1. A radio broadcast beam coverage enhancement method, comprising: determining, by a base station, at least one target traffic beam that covers an area where a data channel quality of at least one terminal is higher than a first threshold and a broadcast channel quality is lower than a second threshold; and transmitting, by the base station, N first synchronization resource block (SSB) beams in at least one bandwidth part (BWP), wherein the N first SSB beams cover the area covered by the at least one target traffic beam, and N is an integer greater than or equal to 1.

2. The method according to claim 1, wherein the at least one target traffic beam comprises a first target traffic beam and the at least one terminal comprises N terminals, for the first target traffic beam, the base station performs data transmission with the N terminals by using the first target traffic beam, a ratio of a quantity of the N terminals where the data channel quality is higher than the first threshold to K is greater than a first preset ratio, and a ratio of a quantity of the N terminals where the broadcast channel quality is lower than the first threshold to K is greater than a second preset ratio, wherein K is an integer greater than or equal to 1.

3. The method according to claim 2, wherein for the first target traffic beam, a ratio of a quantity of the N terminals that perform redirection and/or handover from a 5G network to a 4G network to K is greater than a third preset ratio.

4. The method according to claim 1, wherein the data channel quality is represented by an uplink reference signal (SRS) measurement result, and the broadcast channel quality is represented by an SSB measurement result.

5. The method according to claim 4, wherein the SRS measurement result comprises at least one of an SRS reference signal received power RSRP and an SRS signal to interference plus noise ratio (SINR), and wherein: the SSB measurement result comprises an SSB RSRP.

6. The method according to claim 5, wherein the method comprises: at least one second SSB beam and the N first SSB beams do not completely overlap on a frequency domain resource; and the SSB measurement result comprises a measurement result of the at least one second SSB beam.

7. The method according to claim 6, wherein the first SSB beam is further used to transmit a common physical downlink control channel Common (PDCCH), and the second SSB beam is further used to transmit a Common PDCCH; an offset that is in a BWP of the at least one BWP to which the first SSB beam belongs and that is between a start position of a resource block for transmitting the Common PDCCH and a start position of a resource block for transmitting the SSB is the same as or different from an offset that is in a BWP to which the second beam belongs and that is between a start position of a resource block for transmitting the Common PDCCH and the start position of the resource block for transmitting the SSB; and a time resource that is in the BWP to which the first SSB beam belongs and that is for transmitting the Common PDCCH is the same as or different from a time resource that is in the BWP to which the second SSB beam belongs and that is for transmitting the Common PDCCH.

8. A base station, comprising: a processor; and a memory coupled to the processor, wherein the memory comprise instructions that, when executed by the processor, the first base station perform operations comprising: determining at least one target traffic beam that covers an area and has a data channel quality of at least one terminal that is higher than a first threshold and a broadcast channel quality that is lower than a second threshold; and transmitting, N first synchronization resource block (SSB) beams in at least one bandwidth part (BWP), wherein the N first SSB beams cover the area covered by the at least one target traffic beam, and N is an integer greater than or equal to 1.

9. The base station according to claim 8, wherein the at least one target traffic beam comprises a first target traffic beam and the at least one terminal comprises N terminals, for the first target traffic beam, the base station performs data transmission with the N terminals by using the first target traffic beam, a ratio of a quantity of the N terminals where the data channel quality is higher than the first threshold to K is greater than a first preset ratio, and a ratio of a quantity of the N terminals where the broadcast channel quality is lower than the first threshold to K is greater than a second preset ratio, wherein K is an integer greater than or equal to 1.

10. The base station according to claim 9, wherein for the first target traffic beam, a ratio of a quantity of the N terminals that perform redirection and/or handover from a 5G network to a 4G network to K is greater than a third preset ratio.

11. The base station according to claim 8, wherein the data channel quality is represented by an uplink reference signal (SRS) measurement result, and the broadcast channel quality is represented by an SSB measurement result.

12. The base station according to claim 11, wherein the SRS measurement result comprises at least one of an SRS reference signal received power (RSRP) and an SRS signal to interference plus noise ratio (SINR), and wherein: the SSB measurement result comprises an SSB RSRP.

13. The base station according to claim 12, wherein: at least one second SSB beam and the N first SSB beams do not completely overlap on a frequency domain resource; and the SSB measurement result comprises a measurement result of the at least one second SSB beam.

14. The base station according to claim 13, wherein the first SSB beam is further used to transmit a common physical downlink control channel Common (PDCCH), and the second SSB beam is further used to transmit a Common PDCCH; an offset that is in a BWP of the at least one BWP to which the first SSB beam belongs and that is between a start position of a resource block for transmitting the Common PDCCH and a start position of a resource block for transmitting the SSB is the same as or different from an offset that is in a BWP to which the second beam belongs and that is between a start position of a resource block for transmitting the Common PDCCH and the start position of the resource block for transmitting the SSB; and a time resource that is in the BWP to which the first SSB beam belongs and that is for transmitting the Common PDCCH is the same as or different from a time resource that is in the BWP to which the second SSB beam belongs and that is for transmitting the Common PDCCH.